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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __SOUND_SEQ_VIRMIDI_H
#define __SOUND_SEQ_VIRMIDI_H
/*
* Virtual Raw MIDI client on Sequencer
* Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>,
* Jaroslav Kysela <perex@perex.cz>
*/
#include <sound/rawmidi.h>
#include <sound/seq_midi_event.h>
/*
* device file instance:
* This instance is created at each time the midi device file is
* opened. Each instance has its own input buffer and MIDI parser
* (buffer), and is associated with the device instance.
*/
struct snd_virmidi {
struct list_head list;
int seq_mode;
int client;
int port;
bool trigger;
struct snd_midi_event *parser;
struct snd_seq_event event;
struct snd_virmidi_dev *rdev;
struct snd_rawmidi_substream *substream;
struct work_struct output_work;
};
#define SNDRV_VIRMIDI_SUBSCRIBE (1<<0)
#define SNDRV_VIRMIDI_USE (1<<1)
/*
* device record:
* Each virtual midi device has one device instance. It contains
* common information and the linked-list of opened files,
*/
struct snd_virmidi_dev {
struct snd_card *card; /* associated card */
struct snd_rawmidi *rmidi; /* rawmidi device */
int seq_mode; /* SNDRV_VIRMIDI_XXX */
int device; /* sequencer device */
int client; /* created/attached client */
int port; /* created/attached port */
unsigned int flags; /* SNDRV_VIRMIDI_* */
rwlock_t filelist_lock;
struct rw_semaphore filelist_sem;
struct list_head filelist;
};
/* sequencer mode:
* ATTACH = input/output events from midi device are routed to the
* attached sequencer port. sequencer port is not created
* by virmidi itself.
* the input to rawmidi must be processed by passing the
* incoming events via snd_virmidi_receive()
* DISPATCH = input/output events are routed to subscribers.
* sequencer port is created in virmidi.
*/
#define SNDRV_VIRMIDI_SEQ_NONE 0
#define SNDRV_VIRMIDI_SEQ_ATTACH 1
#define SNDRV_VIRMIDI_SEQ_DISPATCH 2
int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi);
#endif /* __SOUND_SEQ_VIRMIDI */
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